One way to be able to work longer would be to get a job offer and approved LMIA from your current employer or another employer so that you can switch to a closed work permit.
Another option would be to receive ITA through Express Entry (e.g. CEC). Once you receive ITA and submit your complete application, you'll qualify to apply for a Bridging Open Work Permit.
Those are the two options I can think of that may be available.